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KarthickSridharKarthickSridhar
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[BAEL-4478] IP address is in given range or not using java
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‎core-java-modules/core-java-networking-3/pom.xml‎

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<artifactId>javax.mail</artifactId>
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<version>1.6.2</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/com.github.seancfoley/ipaddress -->
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<dependency>
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<groupId>com.github.seancfoley</groupId>
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<artifactId>ipaddress</artifactId>
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<version>${seancfoley.ipaddress.version}</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/com.github.jgonian/commons-ip-math -->
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<dependency>
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<groupId>com.github.jgonian</groupId>
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<artifactId>commons-ip-math</artifactId>
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<version>${jgonian.commons-ip-math.version}</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/com.googlecode.java-ipv6/java-ipv6 -->
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<dependency>
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<groupId>com.googlecode.java-ipv6</groupId>
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<artifactId>java-ipv6</artifactId>
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<version>${googlecode.ipv6.version}</version>
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</dependency>
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</dependencies>
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<build>
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<jetty.embeded.version>9.4.31.v20200723</jetty.embeded.version>
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<tomcat.embeded.version>10.0.0-M7</tomcat.embeded.version>
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<assertj.version>3.11.1</assertj.version>
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<seancfoley.ipaddress.version>5.3.3</seancfoley.ipaddress.version>
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<jgonian.commons-ip-math.version>1.32</jgonian.commons-ip-math.version>
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<googlecode.ipv6.version>0.17</googlecode.ipv6.version>
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</properties>
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</project>

‎core-java-modules/core-java-networking-3/src/main/java/com/baeldung/ipingivenrange/IPWithGivenRangeCheck.java‎

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package com.baeldung.ipingivenrange;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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import inet.ipaddr.IPAddress;
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import inet.ipaddr.IPAddressSeqRange;
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import inet.ipaddr.IPAddressString;
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import inet.ipaddr.AddressStringException;
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import com.github.jgonian.ipmath.Ipv4;
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import com.github.jgonian.ipmath.Ipv4Range;
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import com.github.jgonian.ipmath.Ipv6;
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import com.github.jgonian.ipmath.Ipv6Range;
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import com.googlecode.ipv6.IPv6Address;
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import com.googlecode.ipv6.IPv6AddressRange;
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public class IPWithGivenRangeCheck {
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// using IPAddress library
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public static boolean checkIPIsInGivenRange(String inputIP, String rangeStartIP, String rangeEndIP) throws AddressStringException {
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IPAddress startIPAddress = new IPAddressString(rangeStartIP).getAddress();
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IPAddress endIPAddress = new IPAddressString(rangeEndIP).getAddress();
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IPAddressSeqRange ipRange = startIPAddress.toSequentialRange(endIPAddress);
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IPAddress inputIPAddress = new IPAddressString(inputIP).toAddress();
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return ipRange.contains(inputIPAddress);
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}
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// using Commons IP Math library for IPv4
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public static boolean checkIPv4IsInRange(String inputIP, String rangeStartIP, String rangeEndIP) {
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Ipv4 startIPAddress = Ipv4.of(rangeStartIP);
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Ipv4 endIPAddress = Ipv4.of(rangeEndIP);
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Ipv4Range ipRange = Ipv4Range.from(startIPAddress)
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.to(endIPAddress);
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Ipv4 inputIPAddress = Ipv4.of(inputIP);
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return ipRange.contains(inputIPAddress);
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}
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// using Commons IP Math library for IPv6
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public static boolean checkIPv6IsInRange(String inputIP, String rangeStartIP, String rangeEndIP) {
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Ipv6 startIPAddress = Ipv6.of(rangeStartIP);
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Ipv6 endIPAddress = Ipv6.of(rangeEndIP);
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Ipv6Range ipRange = Ipv6Range.from(startIPAddress)
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.to(endIPAddress);
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Ipv6 inputIPAddress = Ipv6.of(inputIP);
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return ipRange.contains(inputIPAddress);
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}
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// checking IP is in range by converting it to an integer
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public static boolean checkIPv4IsInRangeByConvertingToInt(String inputIP, String rangeStartIP, String rangeEndIP) throws UnknownHostException {
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long startIPAddress = ipToLongInt(InetAddress.getByName(rangeStartIP));
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long endIPAddress = ipToLongInt(InetAddress.getByName(rangeEndIP));
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long inputIPAddress = ipToLongInt(InetAddress.getByName(inputIP));
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return (inputIPAddress >= startIPAddress && inputIPAddress <= endIPAddress);
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}
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private static long ipToLongInt(InetAddress ipAddress) {
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long resultIP = 0;
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byte[] ipAddressOctets = ipAddress.getAddress();
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for (byte octet : ipAddressOctets) {
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resultIP <<= 8;
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resultIP |= octet & 0xFF;
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}
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return resultIP;
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}
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// using Java IPv6 library (which internally uses two long integers to store ip address)
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public static boolean checkIPv6IsInRangeByIPv6library(String inputIP, String rangeStartIP, String rangeEndIP) {
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IPv6Address startIPAddress = IPv6Address.fromString(rangeStartIP);
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IPv6Address endIPAddress = IPv6Address.fromString(rangeEndIP);
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IPv6AddressRange ipRange = IPv6AddressRange.fromFirstAndLast(startIPAddress, endIPAddress);
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IPv6Address inputIPAddress = IPv6Address.fromString(inputIP);
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return ipRange.contains(inputIPAddress);
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}
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}

‎core-java-modules/core-java-networking-3/src/test/java/com/baeldung/ipingivenrange/IPWithGivenRangeCheckUnitTest.java‎

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package com.baeldung.ipingivenrange;
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import static org.junit.jupiter.api.Assertions.*;
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import org.junit.jupiter.api.Test;
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import com.baeldung.ipingivenrange.IPWithGivenRangeCheck;
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class IPWithGivenRangeCheckUnitTest {
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@Test
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void givenIPv4Addresses_whenIsInRange_thenReturnsTrue() throws Exception {
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// test for IPAddress library
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assertTrue(IPWithGivenRangeCheck.checkIPIsInGivenRange("192.220.3.0", "192.210.0.0", "192.255.0.0"));
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// test for Common IP Math library
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assertTrue(IPWithGivenRangeCheck.checkIPv4IsInRange("192.220.3.0", "192.210.0.0", "192.255.0.0"));
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// test for IPv4 by converting it to an integer and checking if it falls under the specified range.
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assertTrue(IPWithGivenRangeCheck.checkIPv4IsInRangeByConvertingToInt("192.220.3.0", "192.210.0.0", "192.255.0.0"));
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}
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@Test
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void givenIPv4Addresses_whenIsNotInRange_thenReturnsFalse() throws Exception {
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// test for IPAddress library
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assertFalse(IPWithGivenRangeCheck.checkIPIsInGivenRange("192.200.0.0", "192.210.0.0", "192.255.0.0"));
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// test for Common IP Math library
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assertFalse(IPWithGivenRangeCheck.checkIPv4IsInRange("192.200.0.0", "192.210.0.0", "192.255.0.0"));
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// test for IPv4 by converting it to an integer and checking if it falls under the specified range.
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assertFalse(IPWithGivenRangeCheck.checkIPv4IsInRangeByConvertingToInt("192.200.0.0", "192.210.0.0", "192.255.0.0"));
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}
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@Test
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void givenIPv6Addresses_whenIsInRange_thenReturnsTrue() throws Exception {
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// test for IPAddress library
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assertTrue(IPWithGivenRangeCheck.checkIPIsInGivenRange("2001:db8:85a3::8a03:a:b", "2001:db8:85a3::8a00:ff:ffff", "2001:db8:85a3::8a2e:370:7334"));
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// test for Common IP Math library
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assertTrue(IPWithGivenRangeCheck.checkIPv6IsInRange("2001:db8:85a3::8a03:a:b", "2001:db8:85a3::8a00:ff:ffff", "2001:db8:85a3::8a2e:370:7334"));
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// test for Java IPv6 library
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assertTrue(IPWithGivenRangeCheck.checkIPv6IsInRangeByIPv6library("fe80::226:2dff:fefa:dcba", "fe80::226:2dff:fefa:cd1f", "fe80::226:2dff:fefa:ffff"));
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}
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@Test
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void givenIPv6Addresses_whenIsNotInRange_thenReturnsFalse() throws Exception {
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// test for IPAddress library
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assertFalse(IPWithGivenRangeCheck.checkIPIsInGivenRange("2002:db8:85a3::8a03:a:b", "2001:db8:85a3::8a00:ff:ffff", "2001:db8:85a3::8a2e:370:7334"));
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// test for Common IP Math library
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assertFalse(IPWithGivenRangeCheck.checkIPv6IsInRange("2002:db8:85a3::8a03:a:b", "2001:db8:85a3::8a00:ff:ffff", "2001:db8:85a3::8a2e:370:7334"));
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// test for Java IPv6 library
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assertFalse(IPWithGivenRangeCheck.checkIPv6IsInRangeByIPv6library("2002:db8:85a3::8a03:a:b", "2001:db8:85a3::8a00:ff:ffff", "2001:db8:85a3::8a2e:370:7334"));
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}
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}

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